Mp isn't everything. Dynamic range, fps, and less noise at high ISO are extremely important to serious PJ and sports shooters. This will NOT be an mp race.

But PJs and sports shooters already have the regular D4 - unless Nikon plan a D4 h / s - if it is an x wouldn't you expect more mp?

CFynn wrote:

Daniel Clune wrote:

I highly doubt more pixels.

There are rumors that Canon is currently testing a high resolution 75MP Canon pro body DSLR camera that will be announced later this year. If these rumours are true, it seems likely that the D4x would have at least 50mp